CN112898922B - Viscoelastic body adhesive tape for repairing long-distance pipeline and using method thereof - Google Patents
Viscoelastic body adhesive tape for repairing long-distance pipeline and using method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
- C09J123/26—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers modified by chemical after-treatment
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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- C—CHEMISTRY; METALLURGY
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- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
- F16L58/10—Coatings characterised by the materials used by rubber or plastics
- F16L58/1054—Coatings characterised by the materials used by rubber or plastics the coating being placed outside the pipe
- F16L58/1063—Coatings characterised by the materials used by rubber or plastics the coating being placed outside the pipe the coating being a sheet wrapped around the pipe
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- C08L2201/14—Gas barrier composition
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- C09J2423/00—Presence of polyolefin
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- C09J2423/00—Presence of polyolefin
- C09J2423/006—Presence of polyolefin in the substrate
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- C09J2469/00—Presence of polycarbonate
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Abstract
The invention discloses a viscoelastic body adhesive tape for repairing a long-distance pipeline opening and a using method thereof, wherein the viscoelastic body adhesive tape comprises a base film layer, an adhesive layer is arranged on the base film layer, and an isolating layer is arranged on the other side of the adhesive layer; the base film layer is made of polybutylene-1 material, the adhesive layer is made of viscoelastic body anticorrosive adhesive material, and the isolation layer is made of polycarbonate material; wherein the viscoelastic body anticorrosive glue comprises a polyisobutylene derivative, butadiene rubber, a filler, an antioxidant and a plasticizer; the polyisobutene derivative is obtained by modifying polyisobutene with alpinetin; the prepared viscoelastic body adhesive tape has high tensile strength, elongation at break and volume resistivity, excellent chemical corrosion resistance, high-temperature stability, thermal aging resistance, hot water soaking resistance and airtight barrier property, low water absorption rate, excellent waterproofness and good application in corrosion protection of long-distance pipeline repaired mouths.
Description
Technical Field
The invention belongs to the technical field of pipeline joint coating, and particularly relates to a viscoelastic body adhesive tape for a long-distance pipeline joint coating and a using method thereof.
Background
The external anticorrosion repaired mouth of the pipeline is related to the anticorrosion quality of the whole pipeline and is a weak link causing the pipeline to lose efficacy; the corrosion prevention of the repaired mouth in the long-distance pipeline is always a difficult point. The common scheme adopted at present is to use a heat shrinkable sleeve for joint coating anticorrosion protection. However, after the long-distance pipeline for urban gas is buried, the pipeline is inevitably extruded by soil of ground and underground building objects, and the problem of unshelling easily occurs in the heat-shrinkable sleeve. However, in the long delta area, the ground water level is generally high, which presents another problem. Due to the non-porous nature of water, due to prolonged soaking and erosion. This leads to the problem of corrosion resistance failure of the repaired mouth heat shrinkable sleeve of the long-distance pipeline. The initial water entry point is generally the lap joint between the heat shrink sleeve and the pipe 3 PE. Therefore, after the anticorrosion construction of the heat shrinkable sleeve of the repaired mouth is finished, the lap joint of the heat shrinkable sleeve and the 3PE anticorrosion layer of the pipeline is coated with the viscoelastic adhesive tape. The main component of the viscoelastic body adhesive tape is rubber, the elongation is high, the bonding strength with the surface of the pipeline is high, the corrosion resistance is good, and the viscoelastic body adhesive tape can be widely applied to the field of external corrosion prevention joint coating of long-distance pipelines.
In the prior art, as application publication No. CN 101935500 a, an anticorrosive viscoelastic body tape and a preparation method thereof are disclosed, the viscoelastic body tape comprises a protection film layer, a first viscoelastic body adhesive layer, a reinforced mesh layer, a second viscoelastic body adhesive layer and a release film layer which are sequentially arranged, the protection film layer, the first viscoelastic body adhesive layer, the reinforced mesh layer and the second viscoelastic body adhesive layer are bonded and compounded into a whole, and the release film layer is adhered on the second viscoelastic body adhesive layer; the viscoelastic body adhesive tape has a self-repairing function, does not need to be coated with primer when in use, and can be directly used for corrosion prevention of special-shaped members. The application of viscoelastic body anticorrosive adhesive tape in the repairing of the circumferential weld seam of the pipeline is researched by Zhang Wei (pipeline technology and equipment, 2011(02):42-44), the anticorrosive structure of the viscoelastic body anticorrosive adhesive tape is formed by overlapping a pipeline body and a prefabricated anticorrosive layer of the pipeline body, and a polypropylene outer protective tape is covered on the viscoelastic body anticorrosive adhesive tape. At normal temperature, the peel strength of the polypropylene outer protective belt to the viscoelastic body backing material is more than or equal to 20N/cm, the peel strength of the viscoelastic body to steel is more than or equal to 50N/cm, and the coverage rate is more than or equal to 95 percent.
Disclosure of Invention
The invention aims to provide a viscoelastic body adhesive tape which has higher tensile strength, elongation at break and volume resistivity, excellent chemical corrosion resistance, high-temperature stability, thermal aging resistance, hot water soaking resistance and airtight barrier property, and lower water absorption rate, namely excellent waterproofness, and can be better applied to the joint coating anticorrosion protection of long-distance pipelines.
The technical scheme adopted by the invention for realizing the purpose is as follows:
a viscoelastic antiseptic gel comprises polyisobutene derivative prepared from gingerol modified polyisobutene.
According to the invention, the polyisobutylene derivative is obtained by modifying polyisobutylene with the alpinetin and is applied to the viscoelastic body anticorrosive adhesive, so that the chemical corrosion resistance of the viscoelastic body anticorrosive adhesive is improved, the anticorrosive adhesive has excellent airtight barrier property and waterproof property, and the viscoelastic body anticorrosive adhesive can be widely applied to adhesive tapes.
Preferably, the polyisobutene derivative is prepared as follows:
weighing 45-60 parts by weight of polyisobutylene, 35-45 parts by weight of n-hexane and 7-10 parts by weight of alpinetin, placing the polyisobutylene, the n-hexane and the alpinetin in a three-neck flask, magnetically stirring, carrying out oil bath for constant temperature, adding 3-6 parts by weight of boron trifluoride diethyl etherate under the condition of introducing nitrogen into the three-neck flask, and reacting for 2-5 hours in a bath at 50-90 ℃ to obtain a reaction product; and (3) carrying out post-treatment on the reaction product, namely washing the reaction product for a plurality of times by using hot water to remove unreacted alpinetin and solvent, and then drying the reaction product by using anhydrous sodium sulfate to obtain the polyisobutene derivative, wherein the conversion rate of the polyisobutene derivative is 76.3-88.7%.
Preferably, the viscoelastic body anticorrosive glue comprises the following components in parts by weight: 90-140 parts of polyisobutylene derivative, 1-3 parts of butadiene rubber, 120-280 parts of filler, 2-12 parts of antioxidant and 2-8 parts of plasticizer.
More preferably, the filler is one or a mixture of montmorillonite, talcum powder, clay or barium carbonate.
More preferably, the antioxidant is one or more of canthaxanthin, sodium metabisulfite, dibutyl phenol or sodium thiosulfate.
More preferably, the plasticizer is one or a mixture of two (2-ethyl hexyl) phthalate, dioctyl phthalate or dodecyl p-toluenesulfonate.
The invention also discloses application of the polyisobutene derivative in improving the airtight barrier property of the viscoelastic body anticorrosive adhesive.
The invention also discloses application of the viscoelastic body anticorrosive adhesive in an adhesive tape.
Preferably, the use of a viscoelastic tape in a long-distance pipeline joint.
The invention also discloses a viscoelastic body adhesive tape for repairing the mouth of the long-distance pipeline, which comprises a base film layer, wherein the base film layer is provided with an adhesive layer, and the other side of the adhesive layer is provided with an isolating layer; the adhesive layer is a viscoelastic body anti-corrosion adhesive material.
Preferably, the base film layer is a polybutylene-1 material; the isolation layer is made of polycarbonate material.
The invention also discloses a preparation method of the viscoelastic body adhesive tape.
A preparation method of a viscoelastic body adhesive tape comprises the following steps:
s1: adding the polyisobutylene derivative, butadiene rubber, a filler, an antioxidant and a plasticizer into a kneading machine, vacuumizing at 130-150 ℃, and kneading for 1-2 hours to obtain the daub;
s2: conveying the daub to a reaction kettle through a single-screw feeder for secondary mixing, wherein the mixing temperature of the reaction kettle is 105-125 ℃, and the mixing time is 1-2 hours;
s3: conveying the mixed daub in the reaction kettle to an extruder through a gear pump for mixing, and extruding through a flat slit die forming die to obtain a glue layer;
s4: and respectively attaching the base film layer and the isolation layer to the upper surface and the lower surface of the adhesive layer, pressing by using a rubber pressing roll, and then cooling by using a cooling roll to obtain the adhesive tape.
More preferably, the thickness of the base film layer is 10-20 μm, the thickness of the adhesive layer is 2-5 μm, and the thickness of the isolation layer is 55-75 μm.
According to the invention, the polyisobutylene derivative is obtained by modifying polyisobutylene with alpinetin and is used as a component of the viscoelastic body anticorrosive adhesive, and the viscoelastic body adhesive tape is prepared from the viscoelastic body anticorrosive adhesive, the filler, the antioxidant and the plasticizer, so that the viscoelastic body adhesive tape has high tensile strength, elongation at break and volume resistivity, and meanwhile, the viscoelastic body adhesive tape has excellent chemical corrosion resistance, high temperature stability, thermal aging resistance and hot water soaking resistance, and has low water absorption rate so as to have long service life; in addition, the viscoelastic body adhesive tape has higher peel strength to steel or pipeline materials (such as PE), and can better meet various technical indexes; the reason may be that the alpinetin modifies the polyisobutylene to change the internal structure of the polyisobutylene, so that various physical and chemical properties of the polyisobutylene are improved, and the polyisobutylene can be widely applied to the joint coating anticorrosion protection of long-distance pipelines.
The invention also discloses a use method of the viscoelastic body adhesive tape for repairing the opening of the long-distance pipeline.
A use method of a viscoelastic body adhesive tape for repairing a long-distance pipeline opening comprises the following steps:
after the corrosion prevention construction of the heat shrinkable sleeve of the joint coating of the long-distance pipeline is finished, coating a viscoelastic adhesive tape at the lap joint of the heat shrinkable sleeve and the 3PE corrosion-resistant layer of the pipeline;
coating photosensitive glass fiber reinforced plastic epoxy primer on the viscoelastic body adhesive tape, and waiting for surface drying of the primer after coating is finished;
and coating the photosensitive glass fiber reinforced plastic on the primer.
The invention also discloses application of the polyisobutene derivative in improving the peel strength of the viscoelastic body adhesive tape for repairing the long-distance pipeline.
The invention also discloses application of the polyisobutene derivative in reducing the water absorption of the viscoelastic body adhesive tape for repairing the long-distance pipeline.
In order to further improve the waterproof property, tensile strength, elongation at break and peeling strength of the viscoelastic body adhesive tape for repairing the opening of the long-distance pipeline and simultaneously ensure that the viscoelastic body adhesive tape has excellent airtight barrier performance, the preferable measures further comprise:
adding 0.5-2.5 parts of a mixture of delta-decalactone and propylene glycol alginate in the preparation process of the daub, wherein the weight ratio of the delta-decalactone to the propylene glycol alginate is 0.2-0.5: 1; the mixture of the delta decalactone and the propylene glycol alginate has a synergistic effect with an antioxidant or a plasticizer component in the viscoelastic body anticorrosive adhesive, so that the water absorption rate of the adhesive tape is reduced, namely the waterproofness of the viscoelastic body adhesive tape is further improved, the mechanical properties (tensile strength, elongation at break and peeling strength) are further improved, and the adhesive tape has excellent airtight barrier property, so that the adhesive tape can be better applied to the field of long-distance pipeline joint coating anticorrosion.
The invention adopts the alpinetin to modify the polyisobutylene to obtain the polyisobutylene derivative which is used as the component of the viscoelastic body anticorrosive adhesive, and prepares the viscoelastic body adhesive tape by the viscoelastic body anticorrosive adhesive, the filler, the antioxidant and the plasticizer, thereby having the following beneficial effects: the viscoelastic body adhesive tape has excellent mechanical properties, namely higher tensile strength, elongation at break and volume resistivity, and simultaneously has excellent chemical corrosion resistance, high temperature stability, thermal aging resistance, hot water soaking resistance and lower water absorption rate so as to have longer service life; in addition, the viscoelastic body adhesive tape has higher peel strength to steel or pipeline materials (such as PE), and can better meet various technical indexes; the reason may be that the alpinetin modifies the polyisobutylene, so that the internal structure of the polyisobutylene is changed, and the physical and chemical properties of the polyisobutylene are improved. Therefore, the viscoelastic adhesive tape has high tensile strength, elongation at break and volume resistivity, excellent chemical corrosion resistance, high-temperature stability, thermal aging resistance, hot water soaking resistance and airtight barrier property, and low water absorption rate, namely excellent waterproofness, and can be well applied to the joint coating anticorrosion protection of long-distance pipelines.
Drawings
FIG. 1 is an infrared spectrum of polyisobutylene and polyisobutylene derivatives;
FIG. 2 is a schematic view of a viscoelastic tape;
reference numerals: 1. a base film layer; 2. a glue layer; 3. an isolation layer.
Detailed Description
The preparation of the polyisobutene derivatives used in the examples of the present invention is as follows:
weighing 52 parts by weight of polyisobutylene, 43 parts by weight of n-hexane and 8.5 parts by weight of alpinetin, placing the polyisobutylene, the n-hexane and the alpinetin in a three-neck flask, magnetically stirring, carrying out oil bath for constant temperature, adding 4 parts by weight of boron trifluoride diethyl etherate under the condition of introducing nitrogen into the three-neck flask, and reacting for 3 hours in a 70-oil-temperature bath to obtain a reaction product; and (3) carrying out post-treatment on the reaction product, namely washing the reaction product for a plurality of times by using hot water to remove unreacted alpinetin and solvent, and then drying the reaction product by using anhydrous sodium sulfate to obtain the polyisobutene derivative, wherein the conversion rate of the polyisobutene derivative is 87.4%.
The structural schematic diagram of the viscoelastic body adhesive tape is shown in fig. 2, wherein the base film layer 1 is a polybutylene-1 material, the adhesive layer 2 is a viscoelastic body anticorrosive adhesive material, and the isolation layer 3 is a polycarbonate material.
The technical solution of the present invention is further described in detail below with reference to the following detailed description and the accompanying drawings:
example 1
A preparation method of a viscoelastic body adhesive tape comprises the following steps:
s1: according to parts by weight, adding 110 parts by weight of polyisobutylene derivative, 1.5 parts by weight of butadiene rubber, 155 parts by weight of clay, 6 parts by weight of dibutyl phenol and 2 parts by weight of dioctyl phthalate into a kneader, vacuumizing at 135 ℃, and kneading for 1.5 hours to obtain cement gum;
s2: conveying the daub to a reaction kettle through a single-screw feeder for secondary mixing, wherein the mixing temperature of the reaction kettle is 115 ℃, and the mixing time at the temperature is 1 h;
s3: conveying the mixed daub in the reaction kettle to an extruder through a gear pump for mixing, and extruding through a flat slit die forming die to obtain a glue layer;
s4: the base film layer is made of polybutylene-1 material, the isolation layer is made of polycarbonate material and is respectively attached to the upper surface and the lower surface of the adhesive layer and is pressed by a rubber pressing roller, and then the adhesive tape is cooled by a cooling roller to obtain the adhesive tape, wherein the thickness of the base film layer is 20 micrometers, the thickness of the adhesive layer is 3 micrometers, and the thickness of the isolation layer is 70 micrometers.
Example 2
A preparation method of a viscoelastic body adhesive tape comprises the following steps:
s1: adding 125 parts by weight of polyisobutylene derivative, 2 parts by weight of butadiene rubber, 140 parts by weight of talcum powder, 6 parts by weight of sodium metabisulfite and 6 parts by weight of dodecyl p-toluenesulfonate into a kneader, vacuumizing at 145 ℃, and kneading for 1h to obtain cement;
s2: conveying the daub to a reaction kettle through a single-screw feeder for secondary mixing, wherein the mixing temperature of the reaction kettle is 110 ℃, and the mixing time at the temperature is 1.5 h;
s3: conveying the mixed daub in the reaction kettle to an extruder through a gear pump for mixing, and extruding through a flat slit die forming die to obtain a glue layer;
s4: the base film layer is made of polybutylene-1 material, the isolation layer is made of polycarbonate material and is respectively attached to the upper surface and the lower surface of the adhesive layer and is pressed by a rubber pressing roller, and then the adhesive tape is cooled by a cooling roller to obtain the adhesive tape, wherein the thickness of the base film layer is 15 micrometers, the thickness of the adhesive layer is 4 micrometers, and the thickness of the isolation layer is 65 micrometers.
Examples 3 to 4
A viscoelastic tape production method, the other steps being the same as those in example 2, except that in example 2: the specific differences in the weight parts of the components in step S1 are shown in Table 1.
TABLE 1 weight parts of the ingredients in the cement
Example 5
A preparation method of a viscoelastic body adhesive tape adopts the following preferable measures:
s1: according to parts by weight, 125 parts by weight of polyisobutylene derivative, 1.5 parts by weight of a mixture of delta-decalactone and propylene glycol alginate, wherein the weight ratio of the delta-decalactone to the propylene glycol alginate is 0.4:1, 2 parts by weight of cis-butadiene rubber, 140 parts by weight of talcum powder, 6 parts by weight of sodium metabisulfite and 6 parts by weight of dodecyl p-toluenesulfonate are added into a kneader, and the mixture is vacuumized and kneaded for 1h at 145 ℃ to obtain cement gum;
the other steps were the same as in example 2.
Example 6
A method of using a viscoelastic tape, comprising the steps of:
(1) after the corrosion prevention construction of the heat shrinkable sleeve of the joint coating of the long-distance pipeline is finished, the lap joint of the heat shrinkable sleeve and the 3PE anticorrosive layer of the pipeline is coated with the viscoelastic body adhesive tape prepared in the embodiment 2;
(2) coating photosensitive glass fiber reinforced plastic epoxy primer on the viscoelastic body adhesive tape, and waiting for surface drying of the primer after coating is finished;
(3) and coating the photosensitive glass fiber reinforced plastic on the primer.
Because the problem of unshelling easily occurs to the heat shrinkable sleeve when the long-distance pipeline joint coating is protected, the heat shrinkable sleeve is coated by the photosensitive glass fiber reinforced plastic with higher surface hardness, compression strength, bending strength and tensile strength, so that the service life and the effect of the heat shrinkable sleeve are ensured; the viscoelastic body adhesive tape has very good airtight barrier property, water resistance and chemical corrosion resistance, and has excellent corrosion resistance, but is softer, so an outer protective material is required to be matched in the use of a buried pipeline; the viscoelastic body adhesive tape is coated at the lap joint of the thermal shrinkable sleeve and the pipeline 3PE, and the photosensitive glass fiber reinforced plastic is used for external protection, so that the problem of corrosion resistance and failure resistance of the repaired mouth thermal shrinkable sleeve of the long-distance pipeline is well solved.
Comparative example 1
A viscoelastic tape production method, the other steps being the same as those in example 2, except that in example 2: in step S1, the polyisobutylene derivative is changed to polyisobutylene.
Comparative example 2
Selecting commercially available 3MTMVHBTMAn adhesive tape (model No. 4941) was used as comparative example 2.
Test example 1
1. Determination of the Infrared Spectrum of polyisobutene derivatives
150mg of potassium bromide powder is weighed in the test and is uniformly ground with a test sample, infrared spectrum analysis test is prepared after tabletting, a Fourier transform infrared spectrometer (FT-IR) is adopted for determination, and the determination wavelength range is 4000-500cm-1。
FIG. 1 shows the IR spectra of polyisobutene and polyisobutene derivatives. As can be seen from FIG. 1, in the infrared spectrum of polyisobutylene, 2956cm-1The absorption peak appeared nearby is the stretching vibration (antisymmetric) of the C-H bond in the methyl methylene, 2896cmThe absorption peak near-1 was stretching vibration of C-H bond in-CH-, and was 1643cm-1The absorption peak near the vibration is the stretching vibration of C ═ C double bond, and the vibration is 1368cm-1An absorption peak appearing nearby is-C (CH)3)3Bending vibration of middle C-H bond, 1208cm-1An absorption peak appearing nearby is-C (CH)3)3Stretching vibration of middle C-C bond at 894cm-1Bending vibration of C-H bond in vinylidene group of the absorption peak appearing nearby; in the infrared spectrum of the polyisobutene derivative, the distance is 3349cm-1The stretching vibration absorption peak of the phenolic hydroxyl group appears nearby, and is 1710cm-1A strong absorption peak appears nearby, and is a stretching vibration peak of the carbonyl; at 1536cm-1Stretching vibration of benzene rings appears nearby; at 1187cm-1A C-O-C stretching vibration peak appears nearby; according to an infrared spectrogram, the polyisobutene is modified by alpinetin to prepare the polyisobutene derivative.
2. Performance testing of viscoelastic tapes
The test items and indexes of the test are shown in table 2, and the performance of the adhesive tapes of the examples and comparative examples was tested.
TABLE 2 index for testing the properties of adhesive tapes
(1) The results of the viscoelastic tape mechanical property test are shown in table 3 below:
TABLE 3 viscoelastic body tape mechanical property test results
As can be seen from Table 3, examples 1 to 5 had tensile strengths of more than 45MPa, elongations at break of more than 485%, average peel strengths for steel of more than 64N/cm, and average peel strengths for PEThe ionic strength is higher than 9N/cm, and the volume resistivity is higher than 1.4 multiplied by 1015Omega · m, the water absorption is not higher than 0.015, all meet each technical index; comparing the example 2 with the comparative examples 1-2, the viscoelastic body adhesive tape in the example 2 has various performances superior to those of the comparative examples 1-2, which shows that the polyisobutene derivative prepared by modifying polyisobutene with alpinetin is used as the adhesive layer material of the adhesive tape, so that the tensile strength, the elongation at break, the average peeling strength to steel, the average peeling strength to PE, the volume resistivity and the water absorption rate of the viscoelastic body adhesive tape are improved, the viscoelastic body adhesive tape has better waterproofness, and various performance indexes of the viscoelastic body adhesive tape are improved; comparing example 2 with example 5, the tensile strength, elongation at break, average peel strength to steel and average peel strength to PE of example 5 are all higher than example 2, while the volume resistivity of example 2 and example 5 is almost not different, which shows that the tensile strength, elongation at break, average peel strength to steel and average peel strength to PE of the viscoelastic tape are further optimized by adding the mixture of delta-decalactone and propylene glycol alginate in the process of preparing the viscoelastic tape, but the volume resistivity of the viscoelastic tape is hardly influenced.
(2) Test determination of viscoelastic body adhesive tape soaked in hot water
The test adhesive tape sample is cut into sheets with the specification of 90mm multiplied by 60mm, 5 groups of parallel experiments are carried out on the same adhesive tape, the sample is soaked in hot water with the temperature of 70 ℃, and after 120 days, the phenomena of bubbling, aging and decomposition are observed on the surface of the sample. The test results are shown in table 4.
TABLE 4 Hot-Water soak test results for viscoelastic tapes
| Test group | Phenomenon(s) |
| Example 1 | Without change |
| Example 2 | Without change |
| Example 3 | Without change |
| Example 4 | Without change |
| Example 5 | Without change |
| Comparative example 1 | Slight bubbling occurred |
| Comparative example 2 | Without change |
As can be seen from table 4, the surfaces of the examples 1 to 5 were not changed after being soaked in hot water at 70 ℃ for 120 days, and the hot water soaking resistance of the viscoelastic tape of the comparative example 1 and the comparative example 1 was superior to that of the comparative example 1, which shows that the polyisobutylene derivative prepared by modifying polyisobutylene with alpinetin as the material of the adhesive layer of the adhesive tape improves the hot water soaking resistance of the viscoelastic tape.
(3) Test determination of high temperature aging resistance of viscoelastic body adhesive tape
In the test, a steel pipe with the diameter of 90mm is selected, polished to remove rust, the adhesive tape is cut into the specification of 50mm multiplied by 3mm, wound clockwise, vertically placed in a 90 ℃ oven, and the change of the adhesive tape is observed after 100 days. The test results are shown in table 5.
TABLE 5 viscoelastic tape high temperature aging test results
| Test group | Phenomenon(s) |
| Example 1 | Without change |
| Example 2 | Without change |
| Example 3 | Without change |
| Example 4 | Without change |
| Example 5 | Without change |
| Comparative example 1 | The adhesive tape is flaccid and deformed |
| Comparative example 2 | Flaccidity of adhesive tape |
As can be seen from Table 5, the surfaces of examples 1-5 were unchanged after being placed in an oven at 90 ℃ for 100 days; while the comparative examples 1-2 have the phenomena of softness and deformation, compared with the comparative examples 1-2, the high-temperature aging resistance of the example 1 is superior to that of the comparative examples 1-2, which shows that the polyisobutylene derivative prepared by modifying polyisobutylene with galangin is used as the adhesive layer material of the adhesive tape, so that the high-temperature aging resistance of the viscoelastic adhesive tape is improved and is superior to that of the commercially available 3M adhesive tapeTMVHBTMAdhesive tape (model: 4941).
(4) Test determination of viscoelastic body adhesive tape chemical medium resistance
The test tape sample is cut into pieces with the specification of 90mm multiplied by 60mm, 3 groups of parallel experiments are carried out on the same kind of tape, the sample is respectively soaked in 10% hydrochloric acid, 10% sodium hydroxide and 3% sodium chloride for 90 days, and then whether the surface of the sample has the phenomena of bubbling, aging and decomposition is observed, and the test results are shown in table 6.
TABLE 6 test results of viscoelastic tape chemical resistance
As can be seen from Table 6, the surfaces of the samples 1 to 5 were unchanged after being soaked in 10% hydrochloric acid, 10% sodium hydroxide and 3% sodium chloride for 90 days; in contrast, the comparative example 1 is treated in 10% sodium hydroxide for 90 days, the viscoelastic body is aged and cracked, and sodium hydroxide is separated out; comparative example 2 treatment in 10% hydrochloric acid for 90d, viscoelastic body aging, cracking, hydrochloric acid precipitation; comparing example 1 with comparative examples 1-2, the chemical medium resistance of example 1 is better than that of comparative examples 1-2, which shows that the chemical medium resistance of the viscoelastic body adhesive tape is improved and the technical index is met by using the polyisobutene derivative prepared by modifying polyisobutene with alpinetin as the adhesive layer material of the adhesive tape.
3. Test determination of viscoelastic body adhesive tape airtight barrier performance
According to the standard GB/1037, the permeability coefficient of the water vapor can be calculated by maintaining a specific water vapor pressure difference between two sides of the sample under a certain relative humidity and temperature, and the water vapor amount passing through the sample can be measured. Wherein the water vapor transmission amount (WVT) is the amount of water vapor transmitted by a sample of 1 square meter within 24 hours under the conditions of fixed relative humidity and temperature and constant thickness and water vapor pressure difference. Wherein the water vapor transmission amount (WVT) is expressed as follows:
WVT＝(24·△m)/(A·t)
in the formula:
WVT-water vapor transmission capacity, g/m2·24h；
Δ m — mass increase over time t, g;
a-area of the sample permeable to water vapor, m2；
t-two time intervals h after a stable quality increase is reached;
wherein, the arithmetic mean value of each group of smart samples is used for representing the test result, and the deviation of the experimental test value from the arithmetic mean value cannot be higher than 10%. The test results are shown in Table 7.
TABLE 7 viscoelastic body tape Barrier Performance test results
| Test group | Water vapor transmission (g/m)2·24h) |
| Example 1 | 1.13 |
| Example 2 | 0.96 |
| Example 3 | 1.04 |
| Example 4 | 1.08 |
| Example 5 | 0.81 |
| Comparative example 1 | 2.74 |
| Comparative example 2 | 2.38 |
As is clear from Table 7, the water vapor transmission amount of the adhesive tapes of examples 1 to 5 was less than 1.15g/m224h, comparing the example 2 with the comparative examples 1-2, and the water vapor transmission amount of the example 2 is lower than that of the comparative examples 1-2, which shows that the water vapor transmission amount of the viscoelastic body adhesive tape is reduced by using the polyisobutene derivative prepared by modifying the polyisobutene with the alpinetin as the adhesive layer material of the adhesive tape, namely the air tightness and barrier property of the viscoelastic body adhesive tape are improved; comparing example 2 with example 5, the water vapor transmission of example 5 is lower than that of example 2, which shows that the addition of the mixture of delta decalactone and propylene glycol alginate during the preparation of the viscoelastic tape further reduces the water vapor transmission of the viscoelastic tape, resulting in the viscoelastic tape having excellent barrier properties.
Conventional operations in the operation steps of the present invention are well known to those skilled in the art and will not be described herein.
The above embodiments are merely illustrative, and not restrictive, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, all equivalent technical solutions also belong to the scope of the present invention, and the protection scope of the present invention should be defined by the claims.
Claims (11)
1. A viscoelastic antiseptic glue comprises polyisobutene derivative prepared from gingerol modified polyisobutene,
the viscoelastic body anticorrosive adhesive comprises the following components in parts by weight: 90-140 parts of polyisobutylene derivative, 1-3 parts of butadiene rubber, 120-280 parts of filler, 2-12 parts of antioxidant and 2-8 parts of plasticizer.
2. Use of the polyisobutylene derivative of claim 1 to improve the air barrier properties of viscoelastic body sealants.
3. Use of a viscoelastic body preservative fluid as set forth in claim 1 for the preparation of a viscoelastic body adhesive tape.
4. Use of a viscoelastic body preservative fluid according to claim 3 for the preparation of a viscoelastic body adhesive tape, characterized in that: the viscoelastic body adhesive tape is used for repairing a long-distance pipeline.
5. A viscoelastic body adhesive tape for repairing a long-distance pipeline opening is characterized in that: the viscoelastic body adhesive tape comprises a base film layer (1), an adhesive layer (2) is arranged on the base film layer (1), and an isolating layer (3) is arranged on the other side of the adhesive layer (2); the adhesive layer (2) is the viscoelastic body anticorrosive adhesive material of claim 1.
6. The viscoelastic body adhesive tape for the joint coating of the long-distance pipeline as claimed in claim 5, is characterized in that: the base film layer (1) is a polybutylene-1 material; the isolation layer (3) is made of polycarbonate material.
7. A method of making a viscoelastic tape as set forth in claim 5, comprising the steps of:
s1: adding the polyisobutylene derivative, butadiene rubber, a filler, an antioxidant and a plasticizer into a kneading machine, vacuumizing at 130-150 ℃, and kneading for 1-2 hours to obtain the daub;
s2: conveying the daub to a reaction kettle through a single-screw feeder for secondary mixing, wherein the mixing temperature of the reaction kettle is 105-125 ℃, and the mixing time is 1-2 hours;
s3: conveying the mixed daub in the reaction kettle to an extruder through a gear pump for mixing, and extruding through a flat slit die forming die to obtain a glue layer;
s4: and respectively attaching the base film layer and the isolation layer to the upper surface and the lower surface of the adhesive layer, pressing by using a rubber pressing roll, and then cooling by using a cooling roll to obtain the adhesive tape.
8. The method of claim 7, wherein the method comprises the steps of: the daub also comprises 0.5-2.5 parts of a mixture of delta-decalactone and propylene glycol alginate, wherein the weight ratio of the delta-decalactone to the propylene glycol alginate is 0.2-0.5: 1.
9. The use method of the viscoelastic body adhesive tape for the repaired mouth of the long-distance pipeline as set forth in claim 5, comprising the following steps:
after the corrosion prevention construction of the heat shrinkable sleeve of the joint coating of the long-distance pipeline is finished, coating a viscoelastic adhesive tape at the lap joint of the heat shrinkable sleeve and the 3PE corrosion-resistant layer of the pipeline;
coating photosensitive glass fiber reinforced plastic epoxy primer on the viscoelastic body adhesive tape, and waiting for surface drying of the primer after coating is finished;
and coating the photosensitive glass fiber reinforced plastic on the primer.
10. Use of the viscoelastic body anticorrosive adhesive as claimed in claim 1 for improving the peel strength of the viscoelastic body adhesive tape for repairing a long-distance pipeline.
11. Use of the viscoelastic body anticorrosive adhesive as claimed in claim 1 for reducing water absorption of viscoelastic body adhesive tape for repairing long-distance pipeline.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103087385A (en) * | 2012-11-23 | 2013-05-08 | 深圳市长园长通新材料有限公司 | High-density high-temperature heat-shrinkable pressure-sensitive tape and preparation method thereof |
| CN103602273A (en) * | 2013-10-28 | 2014-02-26 | 江苏达胜热缩材料有限公司 | Cold pressure-sensitive adhesive tape for pipeline anticorrosion |
| CN104327756A (en) * | 2014-09-15 | 2015-02-04 | 郑州中原应用技术研究开发有限公司 | Viscoelastic body anti-mildew and anticorrosion adhesive for buried pipelines, adhesive tape and preparation method thereof |
| CN105202312A (en) * | 2015-09-17 | 2015-12-30 | 江苏宝力泰新材料科技有限公司 | Viscoelastic body heat shrinking belt and preparation method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103087385A (en) * | 2012-11-23 | 2013-05-08 | 深圳市长园长通新材料有限公司 | High-density high-temperature heat-shrinkable pressure-sensitive tape and preparation method thereof |
| CN103602273A (en) * | 2013-10-28 | 2014-02-26 | 江苏达胜热缩材料有限公司 | Cold pressure-sensitive adhesive tape for pipeline anticorrosion |
| CN104327756A (en) * | 2014-09-15 | 2015-02-04 | 郑州中原应用技术研究开发有限公司 | Viscoelastic body anti-mildew and anticorrosion adhesive for buried pipelines, adhesive tape and preparation method thereof |
| CN105202312A (en) * | 2015-09-17 | 2015-12-30 | 江苏宝力泰新材料科技有限公司 | Viscoelastic body heat shrinking belt and preparation method thereof |
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